Paper-making apparatus for separating sand, metal, and other impurities from pulp.



PATENTED FEB. 27, 1906 J. MAGNAUGHTON. PAPER MAKING APPARATUS FORSEPARATING SAND, METAL, AND OTHER IMPURITIES FROM PULP.

APPLICATION FILED NOV. 23, 1905.

A W r WW a WITNESSES 6/ ATTORNEYS To all whom it may concern;

- UNITED STATES PATENT OFFICE.

JOSEPH MACNAUGHTON, OF EDINBURGH,'SCOTLAND.

PAPER-MAKING APPARATUS FOR S EPARATING SAND, METAL, AND OTHER IMPURITIESFROM PULP.

Specification of Letters Patent.

Patented Feb. 27,1906.

Application filed NovembenZS, 1905. Serial No. 288,764.

Be it known that I, J OSEPH MAONAUGHTON,

I paper-mill manager, a subject of the Kin of Great Britain and Ireland,residing at 3 ester Coat'es Terrace, Edinburgh, Scotland, have inventednew and useful Im rovements in Connection with Paper-Making A paratusfor Effecting the Separation of an Metal, and other Impurities from thePulp, of which the following is a specification.

My invention has for its object to provide means whereby the separationof sand, metal, and other impurities from paper-pulp on its, way tothebreast of the paper-making machine is ef'fected in .a-more efficientmanner than hitherto by ap aratus which occupies but small space andwhich can be cleaned with great ease in a much shorter time and with theuse of a much smaller quantity of water than is necessary for cleaningthe.

sand-traps hitherto used.

The ap aratus according to my invention consists of a conical casing orvessel arranged in connection with the pa er-making machine so that thepaper-pu p on its way-to the breast of the paper making mac he passesthrough the said casing or vessel, pref? erably so that the pulp has acircular or whirling motion through and around the said casing orvessel. The lower end of the said cas ing or vessel opensinto a box orreceptacle for the deposit of sand, metal, and other comaratively heavyimpurities from the pulp, ighter impurities which rise to the surface ofthe pulp in the said casing or vessel bein removed, preferably bypassing off throug an overflow in the casing or vessel situated at thepart thereof whereat the said lighter impurities tend to collect,'thesaid overflow being preferably provided with means by which its heightcan be adjusted. The purified pulp passes from the said casing or vesselby means of a pipe or passa e extending down into the interior of thesai casing or vessel to such a distance from the lower and up er partsthereof,respectively, as will not all bw either the heavier or thelighter impurities aforesaid to pass off with the pulp to the breast ofthe paper-making machine.

I will describe with reference to the accompanying drawings an apparatusconstructed in accordance with my invention, premising that I do notlimit myself to the precise da tails illustrated.

Figure 1 is an elevation, and Fig. 2 isa plan.

have

The conical vessel A is 0 en at bottom and communicates with a boxhaving an outlet provided with a valve b for the withdrawal of depositedmatter. The inlet C for the pul to be purified is arranged so that thepasses tangentially into the casing sai' pul or vesse whereby the pulphas a circular or whirling motion as it passes down through the saidcasing or vessel. The said casing or vessel A is shown with plain sides;but it may ooves or corrugations extending down its si es. I

D is the pipe for the outlet of the purified pul from the casin orvessel A, the lower en of the said ipe opening into the'interior of thesai easing or vessel at a point such that the pulp will be drawn off asfree as possible from impurities, the upper end of the said pipe Dcommunicating with the outlet (1, from which the ulp passes to thestrainers and thence into t e passage leading to the breast of thepaper-making machine.

If desired, the pulp after passing from the casing or vessel A can passthrough an ordinary sand-trap before passing to the strainers andbreast.

In any suitable part of the apparatus such as the outlet-pipe D, forexample there may be magnets to separate any fine magnetic particleswhich may not separate from the pulp in the casingor vessel A; but

I do claim as my invention the use of magnets for separating magneticparticles from p pa E is an opening through the upper part of the casingor vessel A, constituting an overflow, as aforesaid, for any impuritieswhich may rise to the surface of the pulp in the said casmg'or vessel A.The height of this overflow can be regulated by the weir e, capable ofbein raised and lowered b the screw e The pu p which passes off witfiimpurities through any suitable pipe or passage can be separated by anyconvenient means, such as an auxiliary strainer, and returned to thesupply of pulp to be purified.

At intervals, as desired, the deposited matter can be removed from thebox B by opening the valve 1), and when changing or washing up thepaper-making machine my apparatus can be very efliciently and quicklycleaned with a much smaller amount of water than is required forcleaning ordinar sandtraips and with a minimum loss of pu p.

f desired, more than one apparatus as described can be used in series;

such floating Having now particularly described and ascertained thenature of my'said invention and in what manner the same is to beperformed, I claim as my invention- 1. In connection with paper-makingaparatus, a casing, or vessel, such as A, situated so that the pulppasses through it on its Way to the breast of the paper-making machine,the said casing, or vessel, being provided, at bottom, with a box, orreceptacle, for heavy impurities, and having an outlet, commumcatingwith the interior of the said casing, or vessel, for the escape ofpurified pulp; substantially as hereinbefore described.

2. In connection with a paper-making a paratus, a casing adapted topermit the pu p to pass through it on its way to the breast of er-makingmachine, a box at the botthe pa said casing for heavy impurities, and

tom 0 an outlet from said casing, in combination with an outlet forlighter impurities.

3. In combination with a paper-making machine, a casing adapted topermit the pulp to pass through on its Way to the breast of thepaper-making machine, an inlet passing tangentially into said casing, abox at the bottom of said casing for heavy impurities, and a centraloutlet from said casing for the escape of purified pulp.

4. In connection with a paper-making machine, a casing adapted to permitthe pulp to pass through it on its way to the breast of the paper-makingmachine, an inlet passing tangentially into said casing, a box at thebottom of said casing for heavy impurities, and a central outlet fromsaid casing for the es cape of urified pulp, in combination with anadjusta le outlet for lighter impurities at the side of said casing.

In testimony whereof I have signed this specification in the presence oftwo subscribing Witnesses.

JOSEPH MACNAUGHTON.

Witnesses:

PERCY READ GOLDRING, RICHARD BUNDY.

